学习日记【JavaScript】-2020/12/22

教程地址：https://www.bilibili.com/video/BV1ux411d75J?p=121

目前进度：121p/190p

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
        <title></title>
        <script>
            var arr = ['red','yellow','blue','green'];
            for(var i = 0;i < arr.length;i++){
                console.log(arr[i]);
            }
            arr[4]='pink';
            console.log(arr);
            
            var arr1 = [2,6,1,7,4];
            var sum = 0;
            for(var i = 0;i < arr1.length;i++){
                sum += arr1[i];
            }
            var aver = sum/arr1.length;
            console.log(sum);
            console.log(aver);
            
            var arr2 = [2,0,6,1,77,0,52,0,25,7];
            var max = 0
            for(var i = 0;i < arr2.length;i++){
                if(max < arr2[i]){
                    max = arr2[i];
                }
            }
            console.log(max);
            
            var newArr = [];
            var j = 0;
            for(var i = 0;i < arr2.length;i++){
                if(arr2[i] > 10){
                    newArr[j] = arr2[i];
                    j++;
                }
            }console.log(newArr)
            
            var newArr1 = [];
            var m = 0;
            for(var i = arr.length - 1;i >= 0;i--){
                newArr1[m] = arr[i];
                m++;
            }
            console.log(newArr1)
            
            var arr3 = [5,4,3,2,1];
            for(var i = 0;i <= arr3.length - 1;i++){
                for(var j = 0;j <= arr3.length - i - 1;j++){
                    var temp = arr[j];
                    arr[j] = arr[j + 1];
                    arr[j + 1] = temp;
                }
            }console.log(arr3);
            
        </script>
    </head>
    <body>
    </body>
</html>

 

posted @ 2020-12-22 17:14  Shimamura。  Views(78)  Comments(0)    收藏  举报